394 



PAL/EONTOLOGY 



9. UPPER DEVONIAN AMMONOID ZONES. 



A much more detailed scheme of zones, comparable 

 with the zones of the older Palaeozoic or Mesozoic, has 

 lately been established by Dr. Wedekind of Gottingen 

 for the Upper Devonian of Germany. 



Zones la & correspond to 7 and 8 of the preceding list ; lla and /3to 9 ; Ilia to 

 V. toio; VI. and VII. ton. 



